An unknown substance has an empirical formula of CH2 and an experimental molar mass of 56.12 g/mol. Calculate the molecular formula for this compound.

Molecular formula = C₄H₈

Explanation:

Given data:

Empirical formula = CH₂

Molar mass of compound = 56.12 g/mol

Molecular formula = ?

Solution:

Molecular formula:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

Empirical formula mass = 12× 1 + 1.01 × 2= 14.02 g/mol

n = 56.12 / 14.02

n = 4

Molecular formula = n (empirical formula)

Molecular formula = 4 (CH₂)

Molecular formula = C₄H₈

the volume increases

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.